12897878 has 12 divisors (see below), whose sum is σ = 22505652. Its totient is φ = 5527620.

The previous prime is 12897869. The next prime is 12897889. The reversal of 12897878 is 87879821.

It is a happy number.

12897878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65708 + ... + 65903.

It is an arithmetic number, because the mean of its divisors is an integer number (1875471).

Almost surely, 2^12897878 is an apocalyptic number.

12897878 is a deficient number, since it is larger than the sum of its proper divisors (9607774).

12897878 is a wasteful number, since it uses less digits than its factorization.

12897878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131627 (or 131620 counting only the distinct ones).

The product of its digits is 451584, while the sum is 50.

The square root of 12897878 is about 3591.3615802367. The cubic root of 12897878 is about 234.5161494781.

The spelling of 12897878 in words is "twelve million, eight hundred ninety-seven thousand, eight hundred seventy-eight".